I've read about these. At first I thought it was pretty ridiculous, but after reading the article and looking at it w/out any precontrived notions, I think it's pretty slick. I hadn't even thought about the emissions portion of it. In addition, it eliminates the muffler.
This is a great alternative to a blower or turbo in the engine bay of a 4th gen LT1. I had a P600B on my '95TA and it was tight in there. In addition, w/ the original location of the IC mounted horizontal w/ a scoop, it was next to impossible to work on the car. I relocated that into the nose of the car and it opened up a lot of space.
The outcome and results are cool, but I'm more impressed w/ the thought that went into it. It just goes to show what can be done when you think outside the box and aren't afraid to try something new. Now, I wonder if you could do twins w/ that type of setup
Later,
Steve.